strip out too many newlines

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im working on a comment/forum app and when a user enters too many carriage returns i want to remove them before insert to db.

example, user input:

-----snip-----
[quote=user]
foo
[/quote]

<bunch of extra lines>

more text...
-----snip-----


I to change to:

[quote=user]foo[/quote]

more text...

i try this regexp:

$message = preg_replace('#(\[quote(=(&quot;|"|\'|)([^\]]*)\\3)?\])\s+#i', "\\1\n", $_POST['message']);

doesn't remove / replace anything.
I need for it to work when they use [quote=xx] or [quote] and ends with [/quote]
any help?


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